STEF05DPUR

Current Regulation/Management Overview

The STEF05DPUR is an integrated electronic fuse manufactured by STMicroelectronics, designed for monitoring output current and input voltage on a 5 V rail. It protects downstream circuitry from overcurrent and overvoltage conditions. The device features a controlled delay and turn-on time, limiting output current to a predefined safe value during overload. If the condition persists, it disconnects the load. It includes thermal protection signaled via a Fault pin and resets automatically upon supply recycling or Enable pin activation. Key electrical parameters include a continuous current of 3.6 A, an N-channel on-resistance of 40 mΩ, an output clamp voltage of 6.65 V, and a thermal latch at 165 °C. It operates within a junction temperature range of -40 °C to 125 °C and accepts an input voltage between 3.1 V and 10 V.

Current Regulation/Management Feature Summary

• Integrated electronic fuse optimized for monitoring output current and input voltage on 5 V rails
• Automatic reset capability via supply voltage recycling or Enable pin without performance degradation
• Thermal protection circuit with fault signaling through the dedicated Fault pin
• Controlled output voltage ramp and undervoltage lockout functionality

Current Regulation/Management Applications

• Protection of electronic circuitry on 5 V power rails
• Overcurrent and overvoltage protection in series-connected power lines
• Load disconnection during persistent anomalous overload conditions

Current Regulation/Management Procurement Notes

Verify the specific suffix 'D' against official datasheets to confirm functional differences compared to standard variants like STEF05PUR. Ensure compatibility with the required 10-DFN (3x3 mm) package footprint and bare pad soldering requirements. Confirm RoHS3 compliance status if mandated by project specifications. Validate that the operating junction temperature range meets the environmental constraints of the target application.

Current Regulation/Management Selection Notes

Select this component when a non-latching electronic fuse solution is required for 5 V systems. It is suitable for applications needing automatic recovery from short-circuit events without manual intervention. Consider the 40 mΩ on-resistance for power loss calculations. Ensure the design accommodates the 10-VFDFN package dimensions and utilizes small external capacitors as specified in the reference design guidelines.

Current Regulation/Management Part Context

This part belongs to the STEF05 family of eFuses from STMicroelectronics. It serves as a companion to the STEF12 for 12 V power rails. Unlike mechanical fuses, it does not degrade after protection interventions. The device is classified under PMIC current regulation and management, offering a compact alternative to discrete protection circuits in space-constrained designs.

Current Regulation/Management Replacement Considerations

STEF05PUR is a verified substitute within the same family, sharing identical core electrical characteristics and package type.